GATAN Alto 2500 Cryo Units

The cryo systems on the NOVA nanoSEM and the Quanta 3D FEG microscopes are optomized for use on field-emission microscopes. They consist of a freezing unit, a turbo-pumped cryo preparation unit, and a cryo stage that attaches to the microscope stage. The cryo system permits flash freezing of samples in liquid nitrogen slush followed by high vacuum sublimation of unbound water, Pt coating to minimize charge build-up and imaging at temperatures in the range of -100 to -140oC.